Improvement in wrenches



UNITED STATES PATENT OEEIoE.

AURY G. GOES, OF `WOROESTR, MASSACHUSETTS.

IMPROVEMENT IN WRENCHES.

Specification forming part of Letters Patent No. 100,602, dated March 8, 1870.

.To all to whom these presents shall come:

Beit known that I, AURY Gr. GoEs,'of the city and county of Worcester, andState of Massachusetts, have made an invention of l certain new and useful Improvements in Wrenches; and do hereby declare the following to be a full, clear, and exact description thereof, due reference being had to the accompanying drawings, making part of this speciiication, and in which--` Figure l is a perspective representation, and Fig. 2 a longitudinal section, of a wrench in which my improvements are embodied.l Fig. 3 is a section of a portion of the same on an enlarged scale or full size, the more clearly to illustrate one feature .of my invention.

The improvements herein described are based `upon a class of wrenches now in extensive use, known as screw-wrenches, and which consist, brieiiy, of a stationary end jaw, making p art of an attenuated bar, upon which i the movable jaw slides to and fro thereof, with respect to the stationary jaw, the movement of such movable jaw beingeftected by means of a screw which passes through it, and which is pi-voted or connected to the lowerpart of the bar, and stepped within a suitable bearingy .applied thereto to prevent its displacement.

My present improvements have reference to the peculiar arrangement of the step of the screw and of the nut which confines such step in place, by which economy in manufacture and nish in appearance is secured.

In carrying out my present invention I `have `selected as a basis wherewith to illustrate its .a cylindrical portion, to coincide with the end of the handle which enters it. In such a construction of parts I have found that the block, owing to its diversiiiedface, is much more i difficult to produce in bulk, and especially more difficult and expensive to inish, than when constructed as contemplated by the second portion of my invention. v

In order to carry my invention intov effect, I produce the ferrule E in two parts, the upper one, c, or that abutting against the lower end of the bar of the wrench. or a shoulder, b, formed thereupon, being cylindrical in crosssection and milled, in order to serve as a means to screw it upon the screw d, cut upon the shank, and the lower portion, or that denoted by the letter c in the drawings, being also cylindrical, in order to correspond to the end of the handle G, which should preferably extend a short distance into it.

rIhe portion c of the ferrule may or may not screw, upon the shank, and the eXtreme lower end of the shank should be provided with a screw, f, upon which is screwed a nut, g, to secure the handle firmly in place.

A ferrule made as described will be found to answer all the useful purposes of the patented one before mentioned, while it is susceptible of being produced with a high degree ofiinish and at much less cost than such patented one. l

Although to the uninitiated my present improvement may seem trilling and unimportant, yet my experience as a manufacturer has 4demonstrated the fact that in a large number of wrenches the difference in cost between the two forms of ferrule hereinbefore described is a matter of considerable importance, while the improved finish of the nut portion ot' said ferrule and the reduced weight of the shank' render a wrench thus provided much more desirable than under any form heretofore desire to secure by Let- Witnesses FRED. CURTIS, EDWARD GRIFFITH. 

